由avformat_alloc_output_context2(&m_outputContext, nullptr, “flv”, outUrl.c_str())打开时确定对应的封装格式(例如flv)进行开辟内存并初始化赋值,只有在复用时才有效,解复用无效。 AVIOContext(位于 avio.h) AVIOContext:文件(协议)操作的顶层对象 AVIOContext是FFMPEG管理输入输出数据的结构体。本文将会详细...
; avformat_alloc_output_context2(&format_ctx, nullptr, "flv", rtmpUrl); if (!format_ctx) { // fprintf(stderr, "Could not create output format context\n"); return ; } // format_ctx->oformat->flags |= AVFMT_NOFILE; video_stream = avformat_new_stream(format_ctx, NULL); video_co...
avformat_free_context(s); *ps = NULL; return ret; } avformat_open_input()源代码比较长,一部分是一些容错代码,比如说如果发现传入的AVFormatContext指针没有初始化过,就调用avformat_alloc_context()初始化该结构体;还有一部分是针对一些格式做的特殊处理,比如id3v2信息的处理等等。有关上述两种信息不再详细分析...
AVFormatContext *ic = avformat_alloc_context(); err = avformat_open_input(&ic, "rtmp://www.something.com/a.mp4", NULL, NULL); Share Improve this answer Follow answered Dec 19, 2013 at 8:01 Maojia 3333 bronze badges Add a comment Your Answer Sign up or log in Sign up using...
*/ AVFormatContext *avformat_alloc_context(void); /** * Read packets of a media file to get stream information. This * is useful for file formats with no headers such as MPEG. This * function also computes the real framerate in case of MPEG-2 repeat * frame mode. * The l...
@ref avoptions. set by avformat_alloc_context(). * exports (de)muxer private options if they exist. */ const avclass *av_class; /** * the input container format. * * demuxing only, set by avformat_open_input(). */ const struct avinputformat *iformat; /** * the output container ...
调试代码,找到如果设置了time_out参数,就会失败,不设置就没问题,具体原因还没有找到,备注此问题,以待后续继续分析 源代码: 代码语言:javascript 代码运行次数:0 代码运行 av_register_all();avformat_network_init();AVFormatContext*pFormatCtx=avformat_alloc_context();pFormatCtx->interrupt_callback.opaque=this...
public static void main(String[] args) { try { FileInputStream fileInputStream = new FileInputStream(new File("1569311181633.data")); PipedInputStream pipedInputStream = new PipedInputStream(); PipedOutputStream pipedOutputStream = new PipedOutputStream(); pipedInputStream.connect(pipedOutputStream); ...
I'm using ffmpeg libav library for live streaming via RTMP. I want to know how to give my choice of audio and video codec for the particular format in avformat_alloc_output_context2. In Detail: The following command works perfectly for me. ...
>> I'm using ffmpeg libav library for live streaming via RTMP. I want to >> know how to give my choice of audio and video codec for the particular >> format in avformat_alloc_output_context2. >> >> In Detail: >> The following command works perfectly for me. ...